Percussive drill unit



Jan. 3, i C. C. HANSEN PERCUS SIVE DRILL UNIT Filed July 19. 1950 x 2 Sheets-Sheet l s /g C f3@ I ,.92 9&4

6.3 INVENTOR.

@aan s (Ulan/dela.

E HISATTORNEY Jan. 3, C. Q HANSEN I PERCUSSIVE DRILL UNIT Filed July 19, 1930 2 Sheets-Shee, 2

IN V EN TOR. wz' ed HazSel?,

HLS'ATTORNEY.

Patented Jan. 3, 1933 UNITEDMSTA TES g PA"r-rzlw OFFICE i CHARLES C. HANSEN, or EASTON, PENNSYLVANIA, AssreNoa 'ro VINCfERsotri-RAND COMPANY, or JERSEY CITY, NEW` JERSEY, A Conroiaa'rron or NEW JERSEYv PERCUssIvE DEI-1.1.Y 'UNIT Application V:tiled July 19,

This invention relates to percussive drill units, such as are used in conjunction with subaqueous drilling apparatus, and has particularv reference to an improved means of connecting one part of the unit to another.

One object ofthe invention is to prevent unintended displacement of the drilling member forming part of the unit. Y

Another object of the invention is to insure the true alignment of the drilling member with the supporting portion of the unit.

Otherl objects will be in part obvious and in part pointed out hereinafter.

InV the drawings,

Figure 1 is a side elevation, partly in sec- `tion,showing the drill and its support,

Figure 2 is a front elevation of the support with the drill removed,

Figure 3 is a section taken on the line 3-3 of Figure 1, Y

Figure 4 is a section taken on 4-4 of Figure 1, and

Figure 5 is a section taken on the line 5 5 of Figure 1.

Referring more particularly to the drawings vwherein similar reference numerals designat'e corresponding parts throughout the several views, the drilling member forming part of the unit comprises a cylinder l() the une Vwhich is provided at its rearward end with a back head 12 resiliently maintained in position by a heavy spring 14 abutting a'flange 16 through which project bolts 18 entering the cylinder 10 and thereby holding these parts in position upon the cylinder. j

The cylinder 10 is also provided with a piston chamber 20 in which reciprocates a piston 22`actu'ated by pressure fluid from a suitable source `(not shown) liowing along the passages 24 and 26 in the wall of the cylinder 10. The pressure fluid may exhaust through a suitable port 28 inthe cylinder and the ow of pressure fluid through the passages 24 and 26' may be controlledby any suitable type of valve, such as a slide valve,

enclosed within the valve chest 30.

The piston 22 is, in this instance, formed with a reduced portion 32 extending from its front end fora short distance beyondv the front end of the cylinder 10 and having guid- 1930.v serial Najaaose.

ing means thereon in the `form of a sleeve 34 which may be split to enable itto be assembled thereon. Enclosing the frontendA of the cylinder 10 and forming a support for the sleeve 34 is a front head 36. The front head 36 is preferably tapered on'its outside `surface and may `also be split to facilitate assembly uponthe sleeve 34. The sleeve 34 and front head 36 are preferably maintained in position by an internally'tapered collar 38 having bolts 40 extendingtherethrough and threadedly engaging the cylinder 10. It will be apparent that the boltsmay be adjusted to move the collar 38'along the tapered front head 36 to hold the* partsV together. l V

To prevent emission of pressure fluid from the front end lofthe cylinder, the fronth'ead 36 is providedv with packing (not shown) maintained in position by any suitabl'elneans, such as a packing gland which, in this instance, comprises a collar 42 which may be split and have one end abutting the'packing and the other end seated in a-flange 43 which is' secured to' the front head by means `of bolts 44.'

' Beyond the packing4 gland, the piston eX- tension is preferably 'enlarged' as'at 46 and is threaded at its terminal: end for vengagement with a coupling 48which also has provision for the reception of avhollow drill steel 50 by means of athread 52 therein. Support- ',ingthis enlarged end v46 of the piston eXtension is a guide 54 in which the'enlarged portion 46'V is free to reciprocate. The yguide 54 is preferably provided with annular flanges `55 which interlock on one rside lwith a guide support'57 and on the other with a guide cap v59.` Bolts 61a extending through the guide support 57 and guidefcap 59 may be used in conjunction with nuts 63 as shown in Figure 5to secure these parts together. Y

In order to supply hole cleansing'fluid to the end vof the hollow drill steel 50the enlarged portion 46 of the vpistCneXtension' is provided with a passage 56 extending there` through and terminating adjacent a plurality of ports 58 affording means ofv communication with the exterior of the enlarged portion. Convenient means are provided for the admission of cleansing fluid to the ports 58 comprising a Water head 60 fitting around the enlarged portion 46 of the piston extension and having a chamber 61 therein. An aperture 62 through the Wall of the chamber 6l is preferably threaded for the reception of na pipe 64 which may 'convey the cleansing fluid from a suitable source (not shown) to the chamber 61, Where it may enter the ports 58 and beconveyedby the passage 56 to the holloW drill steel. At either end-of the Water head 60l are recesses 66 into which there is inserted packing 68 maintained "therein by means of the glands 70 .and preventing the escape of fluid from the Water head 60.

In -order to :enable the drilling :mem-ber to attached :to the supporting portion of the unit :and also maintained securely thereon, the .cylinder 10, water head 60 and guide support 57 are provided with locating portions in the lfonm 'of projecting lugs 7.2 and pro- .vision 'is made during the manufacture of :these partsto so surface the .faces 7 4 fof the lugs that :these .faces Will all lie in substanitially the same plane -upon assembly. The epposed edges 76 olf the Vlug-s 7 4 are also preferably surfaced ito provide locating points lto hold the dniill laga-inst longitudinal displacement with respect `to the supporting portion as will presently be apparent. Lateral displacement of the drill with respect to thesupporting pertion also insured against by surfacing the edges'fZS ofthe lugs 72 which lienormallto theedges' thereon as shown in Figunes '3,4 and 5. Y

'The l:support ifor the drill, with which the lugs 7.2 may ,cooperate .to maintain the drill securely in position against displacement, fis, iiinstance,in the -formnf asaddle -mem f :ber .89 Aof sufficient length .to extend from a point adjacent the back head 12 to .a point .adj acent .the coupling 48 -on xthe piston eXten- Ssion. The saddle -80 .is pnefenably provided with guidingsur'faces .82fon`one side in order .that it may be reeiprocated back and forth lthe gn-ideways of .a Winch A(not shown) which .forms .another part of -the apparatus .used .inconnection withsubaqueous or other .drilling operations. .A recess 84 .is provided :at .one 1end of thesaddle 8O yfor the .reception -ofa ,pairlof pulleys86wvhich may rotate upon .a,pin 8.8.supported .in the saddle v8O.. The ypul- -leys' may :have the usual grooves laround their peliiphery to prov-ide a guidingsurface .for .the .ropes ,90 :used to .raise and flower the 4drilling.mechanism.

The front surface lof the saddle-80 'is fprovided with projections 92 -disposed at such .pointsalong its length that they Will lie subo sta-ntia-lly opposite the lugs 72 -on the cyl .inder 10, waterlieadand guide support 57 of the drill when 'these tivo members Vare assembled. rtllhe :projections 92 are rvpref- .erablyfraised above fthesurface of the .saddle G5 finnnder that they maybe surfaced in -one operation to provide contact faces all lying in the same plane for engagement With the aligned contact faces 74 on the drill. It will be evident therefore that When the contact faces of the projections 92 of the saddle and the con-tact faces 74 on the -dr-il-l ,are in engagement, 'theV drill `Wil-l be maintained in true alignment with the saddle. To secure the'drill in this position and against longitudinal movement the sad-'dile180' is also provided mth-laterally extending abutments or lugs 94 spaced along its length at such points Athat Whenthe edges 96 thereon are surfaced lthere will .be formed recesses of definite size between neighboring abutments into which the pnojecting lugs on the cylinder 10,'W`ater head 60 :and guide :support 57 will 4enter lwith the surfaced ed-ges $76 on the latter nelements `=insuring a yclose ltitting'contact With thefedfges .96 on the abutinents 94. In this manner the drill will be held against unintended longitudinal movement with .respect to the support. e.

Provision has also been .madein this inven- 4tion to insure against lateral displacement of .the drill with respect to the :support and to Athis lend contact edges 98 :are also pnoyided on the projections 92 YWith which A:the Ysurfaced edges 78 on lugs 7 2 of the-.cylinder 10, water .head 60Y and guide -sugpporit 5.7 ymay contact. As stated in connection with the surfacing -ofthe'contact faceson-.the proiections 92, the

contact edges 98 on these 'projections fmayfalso be sur-faced in ta single operation, ythus ,insuring the true vertical alignment of the drill with :the saddle. The lugs 7 2 on thecylinder l0, Water head 60 and guide :support 57 .and :the projections .92 on 4the saddle 80, are preferably perforated for the reception e-f bolt-s 100 which .in conjunction With nuts 102 may .be Vused tosecure the .drill to the .support 1F rom the foregoing itv Will .be seen that location pointsfhafve been provided along the 'length of the drill so that it =may readily be -retained securely in relationship 'to the support. -Both longitudinal )and lateral displacement of the drill with respect to the support have 'been eliminated `and the true .alignment .of the -drill thus .insured at .all times.

I claim:

A drill .unit comprising la rock drill, a cylinder at one end -of said rock drill, 1a guide support at the opposite end of the cylinder, .a Water head intermediate .the cylinder and the lguide support, spaced locating ,por-'tions aon 'the cylinder, the ,guide support :and the Water head having aligned contact surfaces, saddle, transversely lextending fixed :lugs on the saddle linterlocking With-said locating portions to prevent longitudinal displacement 4of the drill, the guide support Vand the Water head with respect tothe saddle, longitudinally extending lugs on the saddle `also .interlocking 'with the locating portions :to

.roo

prevent lateral displacement of the drill, the guide support and Water head with respect to the saddle, said longitudinally extending lugs having aligned contact surfaces adapted to engage the aligned Contact surfaces on the drill to insure the true alignment of the drill with the saddle, and bolts extending through the locating portions on the drill, the guide support and Water head and through the saddle to secure them together.

In testimony whereof I have signed this speciiication.

` CHARLES C. HANSEN. 

